Piston packing ring



Patented Oct. 1923. .i

JOHN F. MY`ER-s, or DETROIT, MICHIGAN.

' rIsroN PACKING RING.

Application led December 11, 1922.` Serial No. 606,159.

To all whom t may concern.'

Be it known that I, JOHN F MYERS, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Piston Packing`Rings, of which the following is a specification. i

My invention relates broadly to improvements in piston packing and particularly to that type of acting engines.

Engines of this general class, of which the internal combustion engine forms the larger part, depend, for their efficiency, upon the continued proper fit of the piston and its packing within the engine cylinder. Uneven wear of the cylinder walls is inevitable in most cases, for'obvious reasons, and packing rings such as have been heretofore employed in this connection have failed to compensate for such uneven wear of the cylinder walls, with the consequent loss in efficiency of the engine and fouling of upper engine parts with excess oil.

It is therefore the primary object of my improved packing ring to overcome such disadvantages and to effect a perfect seal between the piston and its cylinder wall at all times and positions of the piston `in the cylinder, irrespective of such unevenness in wear as may be traversed in the stroke.

It is also essential and therefore an object of my invention, that the packing ring should yield readily wherever wear in the cylinder wall is encountered, in order that the rubbing or peripheral surface of the ring shall bear evenly against the cylinder wall throughout its entire length and thereby effect uniform tension and wear on the ring.

A further object of my invention is to prevent the passage of oil and gas back of 'the packing ring, under such conditions as have been heretoforeexplained, and to prevent rotation of the ring or its respective parts in use.

Other objects and advantages of my improved piston packing will 'be more apparent from the V following detailed description, in connection with the accompanying drawings; wherein:

Figure 1 is an exploded or imaginary view of my piston packing showing the various parts and'their relation to each other.

Fig. 2 is 'a fragmentary view of/a piston equipped with one of my improved packing employed in single packing rings and illustratesthe functioning of Vthe component parts of the ring in use, and

Fig. 3 is a cross'section on line 3-3 of -'10 eferring to the drawing wherein similar reference characters indicate similar parts, A represents a piston .of any well known or approved construction provided bled in Fig. l, is adapted to fit within the circumferential groove- B in the piston A, as is clearly shown in Figs. 2 and 3, and comprises a thin annular packing ring l, havingl flat inner and outer peripheries 2 and 3 respectively. The ring 1 is split at 75 '4, as is the general practice, and therlower edge is beveled to form an inclined surface 5 extending inwardly from the outer peripheral surface 3, to be explained later on.

A second ring 6, which I will call the compensating ring, is of slightly less diameter than the packing ring 1 and is formed with a fiat upper surface 7 and a beveled surface 8 which extends from the surface 7 to the outer peripheral wall of the ring 6. The

angle of this beveled surface 8 is milled to coincide with the beveled lower edge 5. of the packing ring 1 and is split at 9,'as is clearly indicated in Figjl.

Mounted upon theiflat upper surface 7 of the compensating ring 6, and engaging the inner peripheral wall 2 of the packlng ring 1, is a ribbon spring 10. Thisribbon spring 10 is preferably constructed of hlgh grade steel and ofthe desired gauge andgg width to meet the particular requirements'- of the job to be equipped. Ity is essential however that the width of this y)spring be approximately that of the inner wall 2 of the'packing ring 1.

The spring 10 is bent at intervals, intermediate. its ends 11, to provide'alternate piston and packing ring bearing surfaces and apices 12 and 13, respectively. The apices 13 of the bends l2 are formed as close together as is practical in order .to provide uniform tension throughout the entire lengthlofthe packing ringl 1 and oper- Yate to maintain all portions of the ring 1 in contact with the cylinder wall irrespective of unevenness in wear.

In use, the relatively. thin packing ring l is thus maintained in positive Contact with These tWo rings l and 6 function, through ithe engaging beveled surfaces and 8, to

wedge between the upper and lower ivalls l of the packing groove B under the spring .ension of the compensating ring 8. Rotai tion of the packing ring 1 and the compensating ring G is thus prevented in use and a perfect seal maintained between the piston and its cylinder Wall under all conditions.

What I claim is: A

1. Piston packing comprising a split ring having parallel inner and outer peripheries and a beveled lower edge, a compensating ring having a flat upper surface and a beveled surface coinciding with the beveled lovveredge of said packing ring, and a spring. element mounted on the flat upper surface of said compensating ring and adapted to bear against the cylindrical inner periphery of said packing ring, substantially asdescribed.

2. Piston packing comprlsing a relatively' tially the same width as 4said packing ring adapted toexert pressure against the rear Wall thereof and rest upon the rearward extension of said lcompensating ring, substantially as described@ 3. A.l piston packingr comprising a relatively thin annular split ring having a bcv-y eled lower edge, a s ringl element in Contact with said-ring an adapted to exert unlform pressure throughout the full extent of the width of the rear wall thereof, and

a split compensating ring of less diameter than said pack-ing ring adapted to support said spring and' having a portion 'of its upper edge beveled to receive the lower beveled edge of said pack-ing ring, substantially as dscribed. A

In testimony whereof l aiiix my signature.

JOHN F. MYERS. 

